Question

N
Identify the substance.
is the most abundant metal on the Earth.
crystals are used for keeping time in watches.
....... is a nonmetal used in the vulcanisation of rubber.
metal that is used to harden steel.
is used to make matchstick heads.
metal is used to galvanise iron.
metal is found in a pure state in nature.
... is used in making fertilisers.
... is a nonmetal that has a high melting point.
.... is a nonmetal present in hair, eggs and wool.
ON ooo​

Answer 1

oxygen is the most abundant element on earth